/* ============================================================
   RFC shared stylesheet — donor extracted from neck-pain-mockup.html
   Use for all satellite / condition pages.
   Per-page overrides:
     --hero-bg : set to the sampled edge color of that page's hero image
                 (default #020516 = neck-pain hero). Drives the hero box + gradient.
   At go-live: copy this file to the live repo (e.g. /css/rfc.css) and link with href="/css/rfc.css".
   ============================================================ */

:root{
  --navy:#0B1F3A;--navy2:#122444;--navy3:#1A3A5C;
  --gold:#C9A84C;--gold-light:#E0C47A;--gold-pale:#F5EDD4;
  --cream:#F5F0E8;--cream2:#EDE5D8;--cream3:#DDD0BC;--white:#fff;
  --gray:#8A98A8;--text:#1A2A3A;--lt-text:#3A4A5A;--muted:#4A5A6A;
  --border-gold:rgba(201,168,76,0.25);
  --serif:'Cormorant Garamond',Georgia,serif;--sans:'Jost',system-ui,sans-serif;
  --shell:1200px;
  --hero-bg:#020516; /* default = neck-pain hero edge color; override per page */
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{font-family:var(--sans);font-weight:400;font-size:16px;line-height:1.7;background:var(--cream);color:var(--text);-webkit-font-smoothing:antialiased;}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;}

/* ── ACCESSIBILITY ── */
.skip-link{position:absolute;left:-9999px;top:0;z-index:200;background:var(--gold);color:var(--navy);font-size:.78rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;padding:.7rem 1.2rem;}
.skip-link:focus{left:0;}
:focus-visible{outline:3px solid var(--gold);outline-offset:2px;border-radius:1px;}
.site-header :focus-visible,.hero-article :focus-visible{outline-color:var(--gold-light);}

/* ── HEADER / NAV ── */
.site-header{position:sticky;top:0;z-index:100;background:rgba(11,31,58,0.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--border-gold);transition:box-shadow .3s ease;}
.site-header.scrolled{box-shadow:0 6px 24px rgba(0,0,0,.28);}
.nav-inner{max-width:var(--shell);margin:0 auto;padding:.85rem 28px;display:flex;align-items:center;gap:2rem;}
.brand{display:flex;align-items:center;gap:.8rem;margin-right:auto;}
.brand-mark{width:42px;height:42px;border-radius:50%;border:2px solid rgba(201,168,76,.35);background:#fff;padding:3px;object-fit:contain;flex-shrink:0;}
.brand-wrap{display:flex;flex-direction:column;}
.brand-name{font-family:var(--serif);font-weight:400;font-size:1.05rem;letter-spacing:.04em;color:#fff;line-height:1.1;}
.brand-sub{font-size:8.5px;font-weight:300;letter-spacing:.2em;text-transform:uppercase;color:var(--gold);margin-top:2px;}
.header-nav{display:flex;align-items:center;gap:1.55rem;}
.header-nav a{position:relative;font-size:.72rem;font-weight:400;letter-spacing:.14em;text-transform:uppercase;color:rgba(255,255,255,.8);padding:.2rem 0;transition:color .25s;}
.header-nav a:not(.btn-header)::after{content:"";position:absolute;left:0;bottom:-3px;width:0;height:1px;background:var(--gold);transition:width .3s;}
.header-nav a:hover{color:#fff;}
.header-nav a:not(.btn-header):hover::after{width:100%;}
.btn-header{background:linear-gradient(135deg,var(--gold),var(--gold-light));color:var(--navy)!important;padding:.62rem 1.3rem;border-radius:2px;font-weight:600;letter-spacing:.14em;transition:transform .25s,box-shadow .25s;}
.btn-header:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(201,168,76,.35);}

/* ── HERO (widescreen, full-bleed image; box+gradient = --hero-bg for a seamless blend) ── */
.hero-article{position:relative;background:var(--hero-bg);border-bottom:1px solid var(--border-gold);overflow:hidden;}
.hero-media{position:absolute;inset:0;z-index:0;overflow:hidden;--hero-focus:62%;}
.hero-media picture{position:absolute;top:50%;left:var(--hero-focus);transform:translate(calc(-1 * var(--hero-focus)),-50%);height:100%;width:auto;display:block;}
/* img IS the picture (full height, auto width) positioned by --hero-focus; edges feathered into the navy so a contained image shows the whole subject with no hard seam. Pages with an off-center subject set --hero-focus per photo. */
.hero-media img{height:100%;width:auto;display:block;object-fit:fill;-webkit-mask-image:linear-gradient(to right,transparent 0,#000 10%,#000 90%,transparent 100%);mask-image:linear-gradient(to right,transparent 0,#000 10%,#000 90%,transparent 100%);}
.hero-article::after{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;background:linear-gradient(100deg,var(--hero-bg) 0%,var(--hero-bg) 28%,color-mix(in srgb,var(--hero-bg) 85%,transparent) 42%,color-mix(in srgb,var(--hero-bg) 45%,transparent) 58%,color-mix(in srgb,var(--hero-bg) 10%,transparent) 75%,transparent 90%);}
.hero-inner{position:relative;z-index:2;max-width:var(--shell);margin:0 auto;min-height:clamp(360px,44vh,480px);display:flex;align-items:center;padding:clamp(2.5rem,5vw,4rem) 28px;}
.hero-text{max-width:560px;}
@media(max-width:860px){.hero-media picture{position:static;transform:none;width:100%;height:100%;}.hero-media img{width:100%;height:100%;object-fit:cover;object-position:72% center;-webkit-mask-image:none;mask-image:none;}.hero-article::after{background:linear-gradient(180deg,color-mix(in srgb,var(--hero-bg) 25%,transparent) 0%,color-mix(in srgb,var(--hero-bg) 70%,transparent) 58%,var(--hero-bg) 100%);}.hero-inner{min-height:48vh;align-items:flex-end;}}

.eyebrow{font-size:.82rem;font-weight:500;letter-spacing:.26em;text-transform:uppercase;color:var(--gold);margin-bottom:1.1rem;display:flex;align-items:center;gap:.85rem;}
.eyebrow::before{content:"";width:30px;height:1px;background:var(--gold);opacity:.7;flex-shrink:0;}
.article-title{font-family:var(--serif);font-weight:400;font-size:clamp(2.3rem,5vw,3.6rem);line-height:1.08;color:#FDFCF7;margin-bottom:1.2rem;}
.article-title em{font-style:italic;color:var(--gold-light);}
.article-meta{font-size:.9rem;font-weight:400;letter-spacing:.04em;color:rgba(255,255,255,.7);line-height:1.7;}
.article-meta strong{color:#fff;font-weight:500;}

/* ── ARTICLE LAYOUT ── */
.article-body{max-width:1140px;margin:0 auto;padding:clamp(2.8rem,5vw,4rem) 28px clamp(4rem,7vw,5.5rem);display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:3.4rem;align-items:start;}
.article-content h2{font-family:var(--serif);font-weight:500;font-size:clamp(1.7rem,3.1vw,2.25rem);color:var(--navy);line-height:1.22;margin:2.6rem 0 1rem;}
.article-content h2:first-child{margin-top:0;}
.article-content h2 em{font-style:italic;color:var(--gold);font-weight:400;}
.article-content h3{font-family:var(--serif);font-weight:500;font-size:clamp(1.35rem,2.2vw,1.6rem);color:var(--navy);margin:1.8rem 0 .7rem;}
.article-content p{font-size:1.0625rem;font-weight:400;color:var(--text);line-height:1.8;margin-bottom:1.15rem;}
.article-content strong{font-weight:600;color:var(--navy);}
.article-content em{font-style:italic;}
.article-content ul{margin:0 0 1.15rem;padding:0;list-style:none;display:flex;flex-direction:column;gap:.6rem;}
.article-content ul li{font-size:1rem;font-weight:400;color:var(--lt-text);line-height:1.65;padding-left:1.4rem;position:relative;}
.article-content ul li::before{content:'→';position:absolute;left:0;color:var(--gold);font-weight:500;}

.pullquote{border-left:3px solid var(--gold);padding:1.1rem 1.5rem;margin:2rem 0;background:#F4F1EC;}
.pullquote p{font-family:var(--serif)!important;font-size:1.45rem!important;font-style:italic;font-weight:400;color:var(--navy)!important;line-height:1.5!important;margin:0!important;}
.callout{background:var(--navy);border-radius:2px;padding:1.6rem 1.8rem;margin:2rem 0;}
.callout p{color:rgba(255,255,255,.85);font-size:1rem;line-height:1.7;margin:0;}
.callout strong{color:var(--gold);font-weight:500;}
.callout-cream{background:var(--cream2);border-left:3px solid var(--gold);padding:1.3rem 1.5rem;margin:2rem 0;}
.callout-cream p{font-size:1rem;color:var(--text);line-height:1.75;margin:0;}
.callout-cream strong{color:var(--navy);}

.article-img{width:100%;border-radius:2px;display:block;margin:1.6rem 0;border:1px solid var(--border-gold);}
.article-img-pair{display:grid;grid-template-columns:1fr 1fr;gap:.85rem;margin:1.6rem 0;}
.article-img-pair img{width:100%;height:260px;border-radius:2px;display:block;object-fit:cover;border:1px solid var(--border-gold);}
.article-img-pair .img-caption{text-align:left;margin:.5rem 0 0;}
@media(max-width:680px){.article-img-pair{grid-template-columns:1fr;}.article-img-pair img{height:220px;}}
/* highlighted box heading (callout-cream with a serif title) */
.callout-cream h4{font-family:var(--serif);font-weight:500;font-size:1.3rem;color:var(--navy);margin-bottom:.6rem;line-height:1.25;}
.before-after{display:grid;grid-template-columns:1fr 1fr;gap:.85rem;margin:2rem 0;}
.ba-item{display:flex;flex-direction:column;align-items:center;}
.ba-item img{width:100%;border-radius:2px;border:1px solid var(--border-gold);}
.ba-label{font-size:.66rem;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--gold);margin-top:.6rem;}
.ba-caption{font-size:.78rem;font-weight:400;color:var(--muted);line-height:1.5;margin-top:.3rem;text-align:center;}
.img-caption{font-size:.76rem;color:var(--gray);letter-spacing:.04em;text-align:center;margin:-.6rem 0 1.6rem;}
/* ── TRIPLE X-RAY GRID (3-up case comparison; reuses .ba-item/.ba-label cells) ── */
.xray-trio{display:grid;grid-template-columns:repeat(3,1fr);gap:.85rem;margin:2rem 0;}
@media(max-width:680px){.xray-trio{grid-template-columns:1fr;}}

.case-block{background:var(--cream2);border:1px solid var(--cream3);border-radius:2px;padding:1.6rem 1.8rem;margin:2rem 0;}
.case-block h3{font-family:var(--serif);font-weight:500;font-size:1.35rem;color:var(--navy);margin-bottom:.7rem;margin-top:0;}
.case-block p{font-size:1rem;color:var(--lt-text);line-height:1.75;margin-bottom:.6rem;}
.case-block p:last-child{margin-bottom:0;}

/* ── VIDEO EMBED (responsive 16:9) ── */
.video-wrapper{position:relative;padding-bottom:56.25%;height:0;overflow:hidden;border-radius:2px;margin:0 0 2rem;border:1px solid var(--border-gold);}
.video-wrapper iframe{position:absolute;top:0;left:0;width:100%;height:100%;border:0;}

/* ── GOLD PULL-QUOTE (with attribution) ── */
.pull-quote{font-family:var(--serif);font-size:1.3rem;font-style:italic;font-weight:400;color:var(--navy);line-height:1.55;border-left:3px solid var(--gold);padding:.9rem 1.4rem;margin:0 0 2rem;}
.pull-quote cite{display:block;font-family:var(--sans);font-size:.66rem;font-style:normal;font-weight:600;letter-spacing:.15em;text-transform:uppercase;color:var(--gold);margin-top:.7rem;}

/* ── THREE-T'S / FEATURE CARDS (gold top border) ── */
.t-row{display:grid;grid-template-columns:repeat(3,1fr);gap:.85rem;margin:1.4rem 0 2rem;}
.t-item{background:#fff;border:1px solid var(--border-gold);border-top:2px solid var(--gold);border-radius:2px;padding:1.1rem 1.2rem;}
.t-label{font-size:.62rem;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--gold);margin-bottom:.5rem;}
.t-item p{font-size:.86rem;color:var(--lt-text);line-height:1.65;margin:0;}
@media(max-width:680px){.t-row{grid-template-columns:1fr;}}

/* ── DEEP-READ / CROSS-LINK BOX ── */
.deep-read{background:#fff;border:1px solid var(--border-gold);border-radius:2px;padding:1.2rem 1.5rem;margin:2rem 0;display:flex;align-items:center;justify-content:space-between;gap:1.2rem;flex-wrap:wrap;}
.deep-read p{font-size:.9rem;color:var(--lt-text);margin:0;flex:1;line-height:1.6;}
.deep-read a{font-size:.7rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--gold);white-space:nowrap;}
.deep-read a:hover{color:var(--navy);}

/* ── CITATION (research references) ── */
.citation{font-size:.78rem;color:var(--lt-text);line-height:1.6;border-left:2px solid var(--border-gold);padding:.5rem .9rem;margin:0 0 1.15rem;}
.citation a{color:var(--gold);}
.citation a:hover{color:var(--navy);}

/* ── DEFINITION BLOCK (cornerstone/educational pages) ── */
.definition-block{background:#fff;border-left:3px solid var(--gold);padding:1.4rem 1.7rem;margin:2rem 0;border-radius:0 2px 2px 0;box-shadow:0 1px 2px rgba(11,31,58,.05),0 10px 26px rgba(11,31,58,.06);}
.definition-block .def-label{font-size:.6rem;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--gold);margin-bottom:.55rem;}
.definition-block p{font-size:1.0625rem;color:var(--text);line-height:1.75;margin:0;}

/* ── NAP BLOCK (name / address / phone — location & contact pages) ── */
.nap-block{background:#fff;border:1px solid var(--border-gold);border-top:2px solid rgba(201,168,76,.6);border-radius:2px;padding:1.6rem 1.8rem;margin:2rem 0;box-shadow:0 1px 2px rgba(11,31,58,.05),0 10px 26px rgba(11,31,58,.06);}
.nap-block h3{font-family:var(--serif);font-weight:500;font-size:1.4rem;color:var(--navy);margin:0 0 .8rem;}
.nap-block p{font-size:.95rem;color:var(--lt-text);line-height:1.7;margin:0 0 .3rem;}
.nap-block a{color:var(--navy);font-weight:500;}
.nap-block a:hover{color:var(--gold);}

/* ── VERTEBRA / FEATURE GRID ── */
.vertebra-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:.85rem;margin:1.8rem 0;}
.vertebra-item{background:#fff;border:1px solid var(--border-gold);border-radius:2px;padding:1.1rem 1.2rem;}
.vertebra-item .level{font-size:.7rem;font-weight:600;letter-spacing:.08em;color:var(--gold);margin-bottom:.4rem;}
.vertebra-item p{font-size:.84rem;color:var(--lt-text);line-height:1.6;margin:0;}
@media(max-width:680px){.vertebra-grid{grid-template-columns:1fr 1fr;}}
@media(max-width:480px){.vertebra-grid{grid-template-columns:1fr;}}

/* ── COMPARISON TABLE ── */
.compare-table{width:100%;border-collapse:collapse;margin:2rem 0;font-size:.86rem;}
.compare-table thead th{background:var(--navy);color:var(--cream);padding:.8rem 1rem;text-align:left;font-size:.62rem;letter-spacing:.15em;text-transform:uppercase;font-weight:600;}
.compare-table tbody td{padding:.8rem 1rem;border-bottom:1px solid var(--cream3);color:var(--lt-text);line-height:1.6;vertical-align:top;}
.compare-table tbody tr:last-child td{border-bottom:none;}
.compare-table tbody tr:nth-child(even) td{background:rgba(245,240,232,0.5);}
.compare-table td:first-child{font-weight:600;color:var(--navy);white-space:nowrap;}
@media(max-width:560px){.compare-table{font-size:.8rem;}.compare-table td:first-child{white-space:normal;}}

/* ── SIDEBAR (floating cards) ── */
.sidebar{position:sticky;top:96px;display:flex;flex-direction:column;gap:1.2rem;}
.sidebar-card{background:#fff;border:1px solid var(--border-gold);border-top:2px solid rgba(201,168,76,.6);border-radius:2px;padding:1.6rem;box-shadow:0 1px 2px rgba(11,31,58,.05),0 12px 30px rgba(11,31,58,.07);}
.sidebar-card h4{font-size:.66rem;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--navy);margin-bottom:1rem;padding-bottom:.7rem;border-bottom:1px solid var(--cream2);}
.sidebar-card p{font-size:.9rem;color:var(--lt-text);line-height:1.7;margin-bottom:.8rem;}
.sidebar-card p:last-child{margin-bottom:0;}
.hours-list{list-style:none;display:flex;flex-direction:column;gap:.45rem;}
.hours-list li{display:flex;justify-content:space-between;font-size:.85rem;color:var(--lt-text);}
.hours-list li span{color:var(--navy);font-weight:500;}
.btn-cta{display:block;text-align:center;background:linear-gradient(135deg,var(--gold),var(--gold-light));color:var(--navy);font-size:.72rem;font-weight:600;letter-spacing:.15em;text-transform:uppercase;padding:.85rem 1rem;border-radius:2px;margin-top:.7rem;transition:transform .2s,box-shadow .2s;}
.btn-cta:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(201,168,76,.3);}
.btn-cta.outline{background:transparent;border:1px solid var(--gold);color:var(--navy);}
.btn-cta.outline:hover{background:var(--gold-pale);box-shadow:none;}
.related-links{list-style:none;display:flex;flex-direction:column;gap:.6rem;}
.related-links li a{font-size:.88rem;color:var(--navy);display:flex;gap:.5rem;line-height:1.4;transition:color .2s;}
.related-links li a::before{content:'→';color:var(--gold);flex-shrink:0;}
.related-links li a:hover{color:var(--gold);}

/* ── FOOTER ── */
.site-footer{background:#081627;border-top:1px solid var(--border-gold);padding:3.4rem 0 2.2rem;color:rgba(255,255,255,.7);}
.site-footer .container{max-width:1140px;margin:0 auto;padding:0 28px;}
.footer-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:2.5rem;margin-bottom:2.2rem;}
.footer-col h4{font-size:.66rem;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--gold);margin-bottom:.9rem;}
.footer-col p,.footer-col a{font-size:.85rem;font-weight:400;color:rgba(255,255,255,.72);line-height:1.95;display:block;}
.footer-col a:hover{color:var(--gold);}
.footer-bottom{padding-top:1.4rem;border-top:1px solid rgba(201,168,76,.15);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:.7rem;}
.footer-bottom p{font-size:.74rem;color:rgba(255,255,255,.5);}
.footer-bottom a{color:rgba(255,255,255,.5);}

/* ── REVEAL ── */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease;}
.reveal.visible{opacity:1;transform:none;}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none;}}

/* ── RESPONSIVE ── */
@media(max-width:920px){.article-body{grid-template-columns:1fr;gap:2.4rem;}.sidebar{position:static;}}
@media(max-width:760px){.header-nav a:not(.btn-header){display:none;}.footer-grid{grid-template-columns:1fr 1fr;}}
@media(max-width:480px){.before-after{grid-template-columns:1fr;}.footer-grid{grid-template-columns:1fr;}}